/**
 * Copyright (c) 2008, Mu Dynamics.
 *  All rights reserved.
 *  
 *   Redistribution and use in source and binary forms, with or without modification, 
 *   are permitted provided that the following conditions are met:
 *   
 *  - Redistributions of source code must retain the above copyright notice, 
 *     this list of conditions and the following disclaimer.
 *  - Redistributions in binary form must reproduce the above copyright notice, 
 *     this list of conditions and the following disclaimer in the documentation and/or 
 *     other materials provided with the distribution.
 *  - Neither the name of the "Mu Dynamics" nor the names of its contributors may be used 
 *     to endorse  or promote products derived from this software without specific prior 
 *     written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.mu.jacob.core.builder;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.Map.Entry;

import com.mu.jacob.core.generator.GeneratorException;
import com.mu.jacob.core.model.IModel;
import com.mu.jacob.core.renderer.IRenderer;
import com.mu.jacob.core.util.FileUtils;

/**
 * File builder generates one single file,
 * for example a list of all model classes.
 * @author Adam Smyczek
 */
public class FileBuilder extends AbstractBuilder {

	/**
	 * Output file property name used in build.xml
	 */
	public static final String PROPERTY_OUTPUT_FILE = "output.file";
	
	/* Output file name */
	private String outputFile = null;
	
	/**
	 * Default constructor for ant
	 */
	public FileBuilder() {
	}

	/**
	 * Constructor for JacobRunner
	 * @param templateFile
	 */
	public FileBuilder(final IRenderer renderer, final String templateFile, final String templateRoot, final String outputFile) {
		super(renderer, templateFile, templateRoot);
		this.outputFile = outputFile;
	}

	/**
	 * Build method
	 */
	public void build(IModel model) {
		try {
			IRenderer renderer = getRenderer();
			File outputFile = FileUtils.getOrCreateFile(new File(getBaseDir(), getOutputFile()));
			File templateFile = new File(getTemplateRoot(), getTemplateFile());
			
			for (Entry<String, Object> e : getContextMap().entrySet()) {
				renderer.addContext(e.getKey(), e.getValue());
			}
			renderer.addContext(IRenderer.CONTEXT_BUILDER, this)
				.addContext(IRenderer.CONTEXT_MODEL, model);
			
			String result = renderer.render(templateFile);
			
	        BufferedWriter out = new BufferedWriter(new FileWriter(outputFile));
	        out.write(result);
	        out.close();

	    } catch (Exception e) {
	    	throw new GeneratorException("Builder exception!", e);
	    }

	}
	
	/**
	 * @return output file name
	 */
	public String getOutputFile() {
		if (outputFile == null) {
			outputFile = getProperties().getProperty(PROPERTY_OUTPUT_FILE);
			if (outputFile == null) {
				throw new GeneratorException("Output file name not set!");
			}
		}
		return outputFile;
	}
	
}
